1/*
 2 * Copyright (c) 2000-2002,2005-2006 Silicon Graphics, Inc.
 3 * All Rights Reserved.
 4 *
 5 * This program is free software; you can redistribute it and/or
 6 * modify it under the terms of the GNU General Public License as
 7 * published by the Free Software Foundation.
 8 *
 9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17 */
18#include "xfs.h"
19#include "xfs_vnodeops.h"
20#include "xfs_bmap_btree.h"
21#include "xfs_inode.h"
22#include "xfs_trace.h"
23
24/*
25 * note: all filemap functions return negative error codes. These
26 * need to be inverted before returning to the xfs core functions.
27 */
28void
29xfs_tosspages(
30	xfs_inode_t	*ip,
31	xfs_off_t	first,
32	xfs_off_t	last,
33	int		fiopt)
34{
35	/* can't toss partial tail pages, so mask them out */
36	last &= ~(PAGE_SIZE - 1);
37	truncate_inode_pages_range(VFS_I(ip)->i_mapping, first, last - 1);
38}
39
40int
41xfs_flushinval_pages(
42	xfs_inode_t	*ip,
43	xfs_off_t	first,
44	xfs_off_t	last,
45	int		fiopt)
46{
47	struct address_space *mapping = VFS_I(ip)->i_mapping;
48	int		ret = 0;
49
50	trace_xfs_pagecache_inval(ip, first, last);
51
52	xfs_iflags_clear(ip, XFS_ITRUNCATED);
53	ret = filemap_write_and_wait_range(mapping, first,
54				last == -1 ? LLONG_MAX : last);
55	if (!ret)
56		truncate_inode_pages_range(mapping, first, last);
57	return -ret;
58}
59
60int
61xfs_flush_pages(
62	xfs_inode_t	*ip,
63	xfs_off_t	first,
64	xfs_off_t	last,
65	uint64_t	flags,
66	int		fiopt)
67{
68	struct address_space *mapping = VFS_I(ip)->i_mapping;
69	int		ret = 0;
70	int		ret2;
71
72	xfs_iflags_clear(ip, XFS_ITRUNCATED);
73	ret = -filemap_fdatawrite_range(mapping, first,
74				last == -1 ? LLONG_MAX : last);
75	if (flags & XBF_ASYNC)
76		return ret;
77	ret2 = xfs_wait_on_pages(ip, first, last);
78	if (!ret)
79		ret = ret2;
80	return ret;
81}
82
83int
84xfs_wait_on_pages(
85	xfs_inode_t	*ip,
86	xfs_off_t	first,
87	xfs_off_t	last)
88{
89	struct address_space *mapping = VFS_I(ip)->i_mapping;
90
91	if (mapping_tagged(mapping, PAGECACHE_TAG_WRITEBACK)) {
92		return -filemap_fdatawait_range(mapping, first,
93					last == -1 ? ip->i_size - 1 : last);
94	}
95	return 0;
96}